In my case this tag was applied by an angry former friend as a means to harass. I'm not bothered by it, but it is a silly tag considering that NO ONE searches for bands "under 2000 listens". It would be gracious of the mods to remove this tag, as it really has no significance.
This tag is for artists with fewer than 2000 listeners. The tag is mostly used as a means to filter artists who have a minimum amount of listeners, while being tied to the group ‘under 2000 listeners’.
The tag also sees use by musicians and artists who wish to promote themselves for having a smaller audience, and often artists are ‘untagged’ by users once they breach the 2000 listeners benchmark.
Originally the idea for the tag came from the requirement of the game called Champion of Champions that requires that you listen to music that has less than 2000 listeners.
Tag his its merits, on the one hand it helps get good music with very few listens exposure, on the other hand it's the latest source for pretentious music listeners to get their latest trophy piece, so; it is what it is.